There are unpredictable packet data loss, disorder, variable link transmission and processing delay jitter, and clock asynchrony and drift in the process of spatial multimedia communication, which may cause audio and video asynchrony when the receiving end displays and plays audio and video data. In order to solve this problem, an improved spatial audio and video synchronization method based on timestamp is proposed. This method adopts a relative timestamp mapping model, combined with the synchronous detection and buffer design of the receiving end, and can realize the synchronous transmission of audio and video in spatial communication without the need for the whole network clock and feedback channel, and synchronize the playback and display at the receiving end. The method is simulated and the results show the feasibility of the design. The root mean square error SPD value before synchronization is about 150 ms on average, and the maximum can reach 176.1 ms. The method in this paper can control the SPD value to about 60 ms, which can not only realize the synchronous transmission of audio and video, but also has very low overhead, and can be applied in spatial multimedia communication.
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